It is at the bottom which it is mentioned and I quoted the post and added at the bottom and an explanation. I think that you missed that one. I already included that one before you made a post about Authenticator.
Better than don't have that reminder at all but I don't think it is good enough.
The reminder should be one step before a step to Copy the address to activate 2FA on the application.
Reasons are because if you don't do it before the activation step, how do you have that code for backup?
If you don't make backup first, later you will have no code to backup. If you want to backup, you have to Disable 2FA and Enable it again to get a new Address code for your new activation time.
Your topic does not have a guide for 2FA deactivation and re-enable it with new 2FA activation code.
If your device is no longer usable and you did not back up 2FA, you only can open a support ticket and wait for exchange support. They will ask you to provide documents to verify your identity that is time wasting and not comfortable.
Always backup a code you use to activate your 2FA.
You need it to recover your 2FA later or to import it on other devices.
Always backup in cryptocurrency.